diff --git a/boards/sim/sim/sim/configs/vpnkit/defconfig b/boards/sim/sim/sim/configs/vpnkit/defconfig
index eeccae3cb43..ae9cc85b563 100644
--- a/boards/sim/sim/sim/configs/vpnkit/defconfig
+++ b/boards/sim/sim/sim/configs/vpnkit/defconfig
@@ -31,7 +31,6 @@ CONFIG_DEV_LOOP=y
 CONFIG_DEV_ZERO=y
 CONFIG_DHCPC_RENEW_STACKSIZE=4096
 CONFIG_EXAMPLES_HELLO=y
-CONFIG_EXAMPLES_HELLO_STACKSIZE=8192
 CONFIG_EXAMPLES_NETTEST=y
 CONFIG_FSUTILS_PASSWD=y
 CONFIG_FSUTILS_PASSWD_READONLY=y
@@ -50,6 +49,7 @@ CONFIG_NETDB_DNSCLIENT=y
 CONFIG_NETDEV_IFINDEX=y
 CONFIG_NETDEV_PHY_IOCTL=y
 CONFIG_NETDOWN_NOTIFIER=y
+CONFIG_NETINIT_DHCPC=y
 CONFIG_NET_ARP_SEND=y
 CONFIG_NET_BROADCAST=y
 CONFIG_NET_ICMP=y
@@ -78,7 +78,6 @@ CONFIG_NSH_ROMFSDEVNO=1
 CONFIG_NSH_ROMFSETC=y
 CONFIG_PATH_INITIAL="/bin"
 CONFIG_POSIX_SPAWN_PROXY_STACKSIZE=2048
-CONFIG_PTHREAD_STACK_DEFAULT=8192
 CONFIG_READLINE_TABCOMPLETION=y
 CONFIG_SCHED_HAVE_PARENT=y
 CONFIG_SCHED_LPWORKSTACKSIZE=4096